Tire-pumping mechanism.



1. L. SHROYER. URE PUMPING MECHANISM.

APPLICATION FILED 30,1917.

Patented; Aug. 20, 1918.

FICE.

4 Tian-ruivrinef ivinonnnisrr.

'To all whom it may concern: A

'Be it known that 1, .lecon L. SHROYER,

i a citizen of the United States, residing at Pittsfield, in the county of Berkshire and State of Massachusetts, have invented new and useful Improvements in Tire-Pumping I Mechanism, `ot" which' the following is -a f specification.

` This invention relates to a mechanism for inliating pneumatic tires, the object ofthe invention `being to utilize one of the cylin ders :and pistonskofa gas engine tc pump up the tire of an automobile, and to utilize the same in' such a manner' that n gases will pass from the cylinder through the air tube into the pneumatic tire.

i The invention consists in the con'ibination4 .the gas inlet valve and exhaust valve to the cams are thrown into and out of operation. Fig. 4 is a sectional elevation takenon line i 4--4 of Fig. 3.

Fig. 5 is a sectional elevation similar to Fig. 2 illustrating a modili'ed form of my invention.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, referring to Figs. 1 to 4 inclusive, 6 is one of the cylinders of a series of cylinders in a gas combustion engine, 7 is the piston of said cylinder, 8 the connectingrod, 9 the crank-shaft, 10 is the gas inlet valve, 11 the exhaust valve, 12 and 13 the cam shafts and 14: and 15 the cams.

The inlet valve 10 is connected to the cam 14 by two rods 16 and 17 which are connected together by a sleeve 18. A roll 17 is rotatably mounted in the lower end of the rod 17 and engages the cam 14. rlhe rod 16 has screwthreaded connection with the sleeve 18, the rod 17 has slldlngengagef' ment with the interior of the sleeve 18 and when the parts are in operative position the upper end of the rod 17 bears against the lower edge of a plate 19 which is pro- Speciiikcation of Letters Patent.

Patented Aug. 20,1918.

Application le Api-.i1 30, 1917. Serial No. 165,436.

vided with a stem 2O extending through,

the sleeve 18 and having a handle 21 thereon.

A cross-pin 22 is fast to the stem 20 and is adapted to project into a slot 23 in the sleeve 18, being forced into said vslot by a spring 24 which enoircles the stem 20 and bears at one end against ythe handle 21 and at the other end against said sleeves. `When desired, the stem 20 can be rotated by meansr of the handle 21 until the plate 19 assumes a position at right angles to that shown in Figs. 3 and el, and when the handle 21 is released the spring 24 will force the crosspin 22 into another notchl 25 in the sleeve 18.`

A spring 26 encircles the rod 16 and bears at its lower end against .a collarv 27 onsaid rod and at its upper end against a collar` 28 on a stationary sleeve 29.

1t will be seen that when the parts are in the positions shown in Figs. 3 and Al, the connecting rods 1'6 and 17 and the sleeve 18 will act as one piece, so that the cam 14.- Will raise the gas inlet valve 10 from its seat and the spring 26 will return it to its seat in proper time. 1f, however, the plate, 19 is turned at right angles tothe position shown l in Figs.'3 and e, then the rod 17 will play up and down in the sleeve 18 .and the valve 10 will be held closed at all times by the spring 26.

The connectionsfr'om the cam 15 to the exhaust valve 11 are substantially the saine as the connections just described which exf tend from the cam lll to the inlet valve 10 and, therefore, a description of one will apply equally well to the other.

A plug 30 is screwed into the cylinder `head 31 and has an air inlet passage 32.

thereinwvhich opens from the atmosphere and terminates at its lower end in a port 33. A valve 34 bears against a seat 35 on f said plug and is adapted to open ork close4 said inlet port 33. rlhe valve 34 is provided with a tubular valve stem 36 which 1s screw threaded to receive a nut 37;

A. light spring 38 encircles'the valve stein 36 and bears at its upper end against the nut 37 and at its lower end against the plug 30, thus tendngto hold the valve 34C upon its seat. Inside the spring 38 lis al heavier spring 39 which, under normal conditions,- bears at its lower end upon the plug 30, but its upper end falls short of bearing against the nut 37. The object of this inner spring is to hold the valve 34- closed under all con,-

ditions when the screw 37 is screwed down upon the valvestem 36 until it abuts against the upper end of said heavy spring 39.

A petcock 40 is attached to the upper end of the screw-threaded valve stem 36, said petcock having a tubular extension 41 in which is located a check valve 42. An air .conducting pipe 43 is fastened at one end thereof to the tubular extension 41 and at its other end is connected to the air valve of a pneumatic tire in a manner well known to those skilled in this art.

The general operation of the device herel inbefore described and illustrated in Figs. 1 and 4 inclusive is as follows: Then it is not desired to use the device for the purpose of inflating a tire the usual parts of the gas engine operate in their ordinary well known manner. When, however, it is desired to use one of the pistons of the gas engine and its cylinder for the purpose of pumping air-into a pneumatic tire, the petcock is opened and the connecting rods 16 and 17 are disconnected from operative relation` to each other by turning the stem or pin 20 until the plate 19 is oved from the position illustrated in Figs. and 4 to a position at right angles thereto. The cams 14 and 15 will then operatev only to slide the rod 17 up and down in the sleeve 18, ut

the rod 16 will be left stationary and, therefore,'the inlet valve 10 and exhaust valve 11 will remain stationary and closed.

It will be'understood that the crank-shaft 9 is rotated by the pistons in the other cylinders which are operated in the usual manner and` as the crank-shaft 9 rotates the connecting rod'S will cause the piston 7 to play upwardly and downwardly in trie cylinder 6 and as it moves downwardly will cause the valve S4 to be opened and let air enter through the passage 32 and inlet port into the cylinderg. Upon the return stroke.

of the piston the valve 34 will 'hecomeclosed and air will pass* through the tubular stem 36 and petcock 40, opening` the check valve 42 and passing into the air couducting tube 43, thence through the air valve of the ipncumatic tire and into said pneumatic tire'. lVhen the tire has been inflated sufficiently the air tube is removed from the extension 41 and from the air valve ci?. the.

pneumatic tire'and the petcock 40 it.: closed Lerares shown as adapted to be used in connection with a priming cock of a gas engine. Referring to Fig. 5, 44 is a plug in the'cylinder head 45. 46 is a priming cck to which is connected the air conducting'tube 47 which extends from the priming cock 46 to the air valve of a pneumatic tire. The air passes into the cylinder 'through an air inlet passage 48 which terminates at its lower end in a port 49, said port being closed by a valve 50 which is held against a seat 51 by a spring 52 which encircles the valve stem 53 and bears at its upper end against an adjusting screw 54 which has screw-threaded engagement with the valve stem 53.

When this form of my invention is in operation the gas inlet and exhaust valves are disconnected from the cam shafts, as hereinbefore described in relation to the form of my invention illustrated in Fig. 1, and the priming cock 46 is opened to allow air .to pass from the cylinder through the priming cock and' into the air conducting tube 47. On .the .downward `movement of the piston in the cylinder, its` gas inlet and exhaust valves being thrown' out of oper'ation as hereinbefore described, air passes nto the,

cylinder through the inlet passage 48tl1el valve 50 opening to allow said air to pass into the cylinder. Upon the return movement of the piston the air passes through the priming cock 46 into the air conducting tube 47 and thence through the air valve of the pneumatic tire and into said pneumatic tire. The tire thus becomes inflated and as soon as it has been-sufficiently inflated the priming cock 46 is closed and the connections to the valves 10 and 11 are made operative in the manner hereinbefore described and the engine is then in condition to be used in the'usual manner, with all of its cylinders4 in operation to rotate the crank-shaft. 1

Having thus described my invention, what claim and desire by Letters Patent to secure is:

1. l tire pumping mechanism having, incomhination, an organized gas engine comprising a cylinder, a cylinder piston. means to impart a reciprocatory motion to said piston, said cylinder' having an air inlet port opening i'hereinto,e valve adapted to open and close said port, a hollow stem fast to said valve and terminating at one end. thereofgin a port opening out of said cylinder, a spring encircling said valve stem. and adapted to hold said valve normally closed and air conducting means adapted to connect said stein lo the air valve of a pneumatic tire.

A. tire pumping mechanism having, in combination, an ergere/led gas engine comprising a cyl'nder, a cylinder piston, means to impart a reciprocatory motion to said piston, said cylinder having an air inlet port opening` thereinto, a valve adapted to open and close said port, a hollow stein fast to said valve and terminating at one end thereof in a port opening out of lsaid cylinder,

a spring encircling said valve stem, a nuthaving screw-threaded engagement with said valve stem, said springv hearing' at one end against said nut and atthe other end against a stationary member and air conducting` means adapted to connect said valve Stem to the air valve of a pneumatic tire.

3. E; tircipuinping mechanism having, in

. combination, an organized gas engine comlli prising a cylinder, a cylinderl piston, means to impart a reciprocatory motion to said piston, said cylinder lniviingl anair inlet port opening thereinto, a valve adapted to open` and close said port, a `hollow stem fast to saidmvalve and terminating at one end thereoi' in a port opening cut of said cylinder, a light spring encircling said valve stem, a nut having screw-threaded engagement with said valve stem, said spring' hearing at one end against said nutJ and at the other end vagainst a stationary member, a comparatively heavy spring also encircling said valve stem and shorter'than said tiret-named springand air conducting means adapted to connect said valve stem to lthe air valve of a pneumatic tire.

Ll., A tire pumpingy mechanism having, in combination, an organized gas engine coinprising a cylinder, a cylinder piston, means to impart avreciprocatory motion to said piston, a gas inlet valve, a gas outlet valve, a cam shaft and cams and connections from said cams to said gas inlet and gas exhaust valves, each of said connections comprising a valve stem, a sleeve having screw-threaded gas inlet valve and gas outlet valve will remain closed during the operation of said cylinder piston, said cylinder having an air inlet port opening thereinto, a spring actumeans adaptedto connect said air outlety port tothe air valve of a pneumatic tire.

5. A tire pumping mechanism having, in combination, anorganized gas, engine comprising a cylinder, a cylinder piston, means to impart a reciprocatory motionuto said piston, said cylinder having an air inlet port opening thereinto, a valve adapted to open and close said port, a hollow stem fast to said valve and terminating at one end thereci' in a port opening` ont of said cylinder, a spring encircling; Said valve stem and ada ed to hold the same normally closed manuallyv operable petcock fast to the upper end ci said valve stem, and air conducting means adapted to ,connectsaid petcoclr to the air valve oli' a pneumatic tire.

6. A tire pumping mechanism having, in combination, an organized Ziras engine comprising acylinder, a cylinder piston, means to impart a reciprocatory' motion to said piston, said cylinder having an air inlet port opening thereinto, a valve adapted to open and close said port, a hollow stem fast to said valve and terminating at one end thereof in a port openii'ig out oi' said cylinder, a

spring` encircling said valve stem and adaptved tovhold the same normally closed, a manually operable -petcock fast to the upper end olf said valve stem, air conducting means adapted to connect said petcoclr to the air valve of a pneumatic tire and a check valve interposed between said air outlet port and said air conducting means to prevent air entering said cylinder through said outlet port.

ln testimony whereof l have hereunto set my hand in presence oi' two subscribing' witnesses. 1

facon n sniaovnn.

Witnesses:

SYDNEY E. TAFT,

Annu; J. BAILEY. 

